Eliot Ness
Wally Legenza
'Big' Bill Phillips (as Alan Hale)
Flora Weinberg
Agent Martin Flaherty
Georgie Kaufman
Artie McLeod
Elizabeth 'Lizzie' Dauphine
Willie Weinberg
Amy Randall
Sidney Weinberg
Bobby Mais
Agent William Youngfellow
Agent Enrico Rossi
LaMarr Kane
Jack Rossman
Narrator (voice)
Police Officer (uncredited)
Doctor (uncredited)
Sheriff Wilson (uncredited)